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Hydraulic Actuation
Maintainability Advantages
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Reliability and Maintainability Demonstration of Electric Actuation in the C-141 Electric Starlifter
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- Increased Troubleshooting Capability
- Built-In-Test of Components
- Fault Code Indentification Recorded in ECU
- Maintenance Interface Panel Interconnect to Maintenance Computer
- Reduced Remove and Replace Time
- No Filling and Bleeding
- Easy access to mounting - 4 Connectors
- Auto-Rigging Capability
- Maintenence Computer Monitoring and Resetting
- Health Monitoring
- Reduced Aircraft Down Time
Program Approach:
- Develop Fly-By-Wire, Power-By-Wire Subsystem for C-141 Ailerons
- Conduct extensive qualification testing on subsystem
- Complete 5 million cycles of endurance
testing
- 412th Test Wing at Edwards AFB mod and fly the aircraft
- Initial flight testing conducted at
Edwards AFB (First Phase, 20 flight hrs)
- 412th Test Wing to fly AMC Missions
(Second Phase 1,000 hrs)
C-141 Electric Aileron Subsystem
- Fly-By-Wire control system
- Self contained Power-By-Wire actuation subsystem
- Dual channel, fail-safe subsystem
- Consists of: electric actuators; electronic control unit; command sensors; maintenance interface panel
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- Reduced Vulnerability
- No Shared Failures
- Eliminate Multiple Hydraulic Systems
- Hardening To Ground Fire / Shrapnel
C-141 ELECTRIC AILERON SUBSYSTEM
Environmental Testing per MIL-STD-810
- Vibration Testing Complete
- Shock Testing Complete
- ECU Moisture Testing Complete
- Limit Load (Acceleration) Testing Complete
- Temperature/Altitude Testing Complete
- Temperature Shock Testing Complete
- EMI / Lightning Testing Complete
- 1.5 million cycle endurance test complete
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Model 91E06 Electric Actuator Successfully Completing Vibration Testing |
Electric Actuation System Under
Endurance Test at Goodrich-Utica
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Schedule:
- Continue Phase II operational flights through mid FY 98
- Complete 5 million cycle endurance test in August 1997
- Final report delivered September 1998
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Summary:
- Modified C-141A with electric aileron actuators
- Successful first flight on 25 April 1996
- 20 hours of airworthiness flight testing completed successfully
- Electric Starlifter has flown ~500 hours of operational missions
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